Bekgh



(No Model.)

H. VAN HOEVENBERGH.

TYPE WHEEL FOR PRINTING TELEGRAPHS. No. 316,684. Patented Apr. 28, 1885-.

wan/W0 54100 W (oz N. PETERS, Phatmhliwgflpher. Washington. D C

ITEI) ATiENlf rricno HENRY VAN HOEVENBERGH, OF ELIZABETH, NEWV JERSEY, ASSIGNOR TO THE BALTIMORE 8t OHIO TELEGRAPH COMPANY, OF BALTIMORE, MD.

TYPE-WHEEL FOR PRlNTlNG-TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 316,684, dated April 28, 1885.

Application filed August '7, 1884. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY VAN HOEVEN- BERGH, a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Type Wheels for Printing-Telegraphs, of which the following is a specification.

My invention relates to the construction of type -wheels for printing telegraph instruments.

The object of the invention is to provide means for effecting impressions from either of two type-wheels at will without the aid of complicated mechanism.

The invention consists in mounting two type-wheels of different diameters on the same shaft, the one type-wheel being rigidly secured to the shaft,whi1e the remaining type wheel is loosely mounted upon the same. Means are provided for locking the second type-wheel to the first-named type-wheel or to its shaft and for unlocking it therefrom at the will of the transmitting-operator.

In carrying out my invention I secure the smaller type-wheel rigidly to a typewheel shaft which is provided with any suitable means for producing a stcp-by-step motion. The larger type-wheel is carried upon a sleeve loosely surrounding the shaft, and is capable of being locked thereto by means of a couplingpin which extends toward the lateral surface of the smaller type-wheel. The smaller typewheel is designed to carry those characters which are more frequently employed in printingsuch, for instance, as the more important letters of the alphabet-while the larger typewheel is designed to carry the less important letters, the numerals, and such other characters as are desired less frequently. The periphery of the larger type-wheel is cut away at one point a sufficient distance to expose a section of the smaller wheel. A single printing-platen is employed for effecting impressions from both type-wheels. This platen will cause impressions to be taken from the larger typewheel except when that type-wheel is arrested in such a position that the point where its periphery is cut away is presented to the printing-platen. When, therefore, it is desired to effect impressions from the smaller type-wheel, the larger type-wheel is arrested in such a position that this point will be above the platen, and it is at the same-time unlocked from the smaller type-wheel and held in that position. By then revolving the smaller type wheel any desired character upon its periphery may be presented to the platen, and impressions will be taken therefrom in the usual manner. NVhen it is desired to effect anini- 6 pression from the larger type-wheel, the latter is locked to the smaller type-wheel and permitted to revolve therewith. Any desired char acter upon its periphery may then be brought above the platen,which, upon being actuated, 6 will effect impressions therefrom to the exclusion of the characters upon the smaller typewheel, for the reason that the platen will be prevented from making contact with the smaller by striking against the periphery of 0 the larger type-wheel.

The means which I prefer to employ for locking and unlocking the two type-wheels consist of a pin extending through thelarger type-wheel toward the smaller type-wheel, in 7 the direction of which it is normally forced by means of a suitable spring. This pin is designed to enter an. aperture formed in the smaller type-wheel, and when it is released from a lever controlled by an electro-magnet it serves to lock the two wheels together. The electro-magnet maybe either a polarized electro-magnet designed to respond to currents of different polarities or it may be a neutral electro-magnet, the armature-lever being actuated 8 5 in one direction by a spring and in the opposite direction through the action of electric currents. The electro-magnet may be included in the circuit of the main line through which are transmitted the currents employed for act- 0 uating the escapement and the printing-lever, or an independent conductor may beemployed.

In another application of even date herewith, Serial No. 189,880, certain devices are shown which in some respects resemble those 5 Shown herein, and I do not herein claim any of the devices shown, described, and claimed in such other application and not specifically claimed herein.

In the accompanying drawings, Figure 1 shows in elevation such parts of a printingtelegraph instrument as are necessary to illustrate my invention; and Fig. 2 is a plan of the same, partly in section, showing certain details in the organization of the locking and unlocking device of the type-wheel.

Referring tothe-drawings, A represents the type-wheel shaft, upon which is rigidly mounted a type-wheel, B, of usual construction. Upon a sleeve, 0, is carried a second typewheel, the diameter of whichis slightly greater than that of the type-wheel B. The typewheel 0 is constructed in the same manner as the type-wheel B, with the exception that at one point in its periphery the wheel is cut away,as shown at 0 to a depth somewhat beyond the periphery of the wheel B. It is designed that when the type-wheel O is not in operation it shall be arrested with the point 0 above the printing-platen D of the instrument. Impressions will then be taken from the type-wheel B by means of the printingplaten in the usual manner. If, however, the type-wheel G be locked to the type-wheel B, and revolved so that its characters are brought in succession above the platen, impressions will be taken from the larger type-wheel, but 'no impression will be taken from the typewheel B for the reason that the platen is prevented from carrying the paperinto contact therewith.

For the purpose of locking and unlockingthe type-wheels, a pin, 6, is employed, which passes through a sleeve carried upon the typewheel 0, and is pressed toward the type-wheel 'trolling the locking and unlocking device consist of an electro-magnet, M, which may be included in the main-line circuit or in the circuit of an independent conductor, as desired. This electro-magnet is providedwith an armature, m, carried upon an armature-lever m. At the end of the armature-lever m is carried a hook or forked catch, m, which is designed to engage a projection, f, carried upon the pin e. WVhen the type-wheels have been arrested in a given positionthat is to say, with the open space 0 of the type-wheel 0 above the printi.ng-platenif, then, the electro-magnet M be vitalized and the armature m impelled away from the type-wheel, the catch an will engage the extension f of the pin e and withdraw it from engagement with the type-wheel B. The latter may then be actuated independently of the type-wheel 'G, which is held in the position which it last assumed by reason of the forked catch an engaging the extension f upon both sides. The armature at will remain in the position away from the type-wheel until the electro-magnet is again demagnetized and it is drawn back by the retractile spring 3.

It is designed that the electro'magnet M, when it is included in'the main-line circuit, shall respond only to currents of a different polarity or of greater strength than are employedfor actuating the escapement device and the printing-magnet. When, however, the electro-magnet is included in a special wire, currents of any desired strength may be employed.

Any suitable form of unison device may be adapted to the instrument as found convenient. a

- It is essential that the type-wheel B should be in unison with the transmitting device when it is desired to lock the type-wheel C thereto. Otherwise the pine, upon being released,

would strike against the surface of the typev wheel B without entering the aperture 9. If, however, the pin shouldbe released when the type-wheel B is not in unison, a shoulder, m

carried upon the lever m, will engage with,

the pin 6 after it has been released from the fork m and hold it until it shall have entered the aperture 9, formed in the type-wheel B. The type-wheel G will therefore remain at its unison-point, although released from the fork, until the pin 6 has engaged the type-wheel B.

I claim as my invention 1. The combination, substantially as hereinbefore set forth, ofa type-wheel shaft and two type-wheels carried thereon, one of which is of greater diameter than the other and has a portion of its periphery cut away.

2. The combination, substantially as hereinbefore set forth, with a type-wheel shaft of a printing -telegraph instrument, of a typewheel rigidly secured thereto, and a second type-wheel having a greater diameter than the first-named type-wheel loosely mounted upon said type-wheel shaft and havinga portion of its periphery cut away. 3. The combination, substantially as hereinand means for printing from either of the typewheels.

IOO

rio

cut away is presented to the printing-platen of the instrument.

6. The combination, substantially as hereinbefore set forth, of a type-wheel shaft, two independentlymovable type wheels, a pin for locking said type-wheels together, and an electro-magnet, its armature and armature-lever serving to engage said pin and remove it from engagement with one of said type-wheels and to retain the other type-wheel in a given position at the will of the transmitting-operator.

7. The combination, substantially as herein-' before set forth, with a type-wheel shaft and two type wheels of different sizes carried thereon,thelarger of which is cut away through a portion of its periphery, of a printing-platen for effecting impressions from the one typewheel or the other accordingly as the portion of the latter type-wheel which is cut away is or is not presented to the printing-platen.

8. The combination,substantially as hereinbefore set forth, with a type-wheel shaft and two type-wheels, one of which is attached to said shaft while the'other is movable upon the same,ofmeans,substantially such as described, for coupling said type-wheels together, an electro-magnet, its armature and armature-lever. and a detent carried upon said movable type-wheel, which detent by contact with said lever arrests said type-wheel in a predetermined position.

9. The combination, substantially as hereinbefore set forth, with atypewheel shaft and two type-wheels, one of which is rigidly supported upon said shaft while the other is movable thereupon, of a pin for locking said typewheels together, an electromagnet, its armature and armature-lever for controlling said pin, which pin serves as a detent for arresting said type-wheels in a given position, substantially as described.

10. The combination, substantially as hereinbefore set forth, with atype-wheel shaft and two type-wheels carried thereon, of a pin for locking said type-wheels together, and an electro-magnet for withdrawing said pin from one of said type-wheels and for arresting the other of said type-wheels in a given position,which pin by making contact with said armature-lever serves to arrest said type-wheel in a predetermined position.

11. The combination, substantially as hereinbefore set forth, with two type-wheels one of which is movable independently of the other, and means,substantially such as described, for coupling the same together, of a unisonstop carried upon one of said type-wheels, and an electro-magnet, its armature and armaturelever for engaging said unison-stop and for controlling said coupling device, substantially as described.

12. The combination, substantially as hereinbefore set forth, with two type-wheels one of which is movable independently of the other, and a unison-stop carried upon one of said type-wheels, of a device for coupling said type-wheels together, and an electro-magnet, its armature and armature-lever for controllingsaid coupling device, which lever when in position to permit said type-wheels to be locked together is out of the path of said unison-stop.

13. The combination, substantially as hereinbefore set forth, with a type-wheel shaft and two type-wheels carried thereon one of which is movable independently of the other, of a pin for locking said type-wheels together, and an electro-magnet, its armature and armaturelever for controlling said locking-pin, which pin serves as a unison-stop,and is engaged by said armature-leverbefore said locking device is in position to be actuated by said armaturelever, substantially as described.

In testimony whereof I have hereunto subscribed my name this 14th day of April, A. D. 1884.

HENRY VAN HOEVENBERGH.

\Vitnesses:

CARRIE E. DAVIDSON, CHARLES A. TERRY. 

